... :J,K,T,E,N,R,S,B k type thermocouple mineral oxide thermocouple for a wide range of industrial applicationstemperature limits:-40 ... ](t>333°C)mineral insulated(Mgo)thermocouple element and continuous metal sheath application versatilityk type transition style thermocouple probe.the probe is 6 ... ,insulation :fiberglass with stainless steel overbraid(900 deg.F) K type thermocouple